> Find a pretty outdoor area where some property developer kindly built commons seating on their own dime, and drive a coffee food truck up to it.

Most places with high demand like this also have prohibitions (or limited parking/operating permits) on things like coffee trucks, in my experience. Another issue with our prohibitive land use practices in north america.

I don't know about other cities, but in Washington, DC, the pandemic lockdown essentially destroyed the food truck business. A few operate along the edges of the National Mall, where the customers must be tourists. But McPherson Square, Farragut Square, and L St. NW used to have a lot of food trucks and have none now.

So maybe find a pretty outdoor area where there are lots of tourists.